Remove TestExpectations duplicates after r181492, r181493.

ToT currently doesn't pass lint-test-expectations; address.

TBR=eae
BUG=
NOTRY=true

Review URL: https://codereview.chromium.org/547023003

git-svn-id: svn://svn.chromium.org/blink/trunk@181498 bbb929c8-8fbe-4397-9dbb-9b2b20218538